| dc.creator | Romero, Gustavo Esteban | |
| dc.creator | Cellone, Sergio Aldo | |
| dc.creator | Combi, Jorge Ariel | |
| dc.date | 2000 | |
| dc.date | 2019-10-29T12:35:02Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/84260 | |
| dc.identifier | issn:0004-6256 | |
| dc.description | We report the results of a microvariability monitoring campaign on the southern blazar PKS 0537-441. The source was observed in the V and R optical bands throughout six consecutive nights. Strong variations at both bands, with amplitudes of ∼0.3 mag, were observed on timescales of about 2 days. Smaller fluctuations of ∼0.05 mag on a scale of a couple of hours are superposed on the larger outburst. The spectral index was also variable during the observing period, with an average value of α = -1.6 and changes up to ∼27.5%. The spectrum varies in the sense that it becomes harder when the source is brighter, in accordance with predictions of shock-in-jet models. We discuss our results and the possible origin of the variability in this blazar in light of recent higher frequency observations. | |
| dc.description | Facultad de Ciencias Astronómicas y Geofísicas | |
| dc.description | Instituto Argentino de Radioastronomía | |
| dc.format | application/pdf | |
| dc.format | 1192-1197 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Ciencias Astronómicas | |
| dc.subject | BL lacertae objects: individual (PKS 0537-441) | |
| dc.subject | Galaxies: active | |
| dc.subject | Galaxies: photometry | |
| dc.title | Two-color photometry with high temporal resolution of the extremely variable blazar PKS 0537-441 | |
| dc.type | Articulo | |
| dc.type | Articulo | |
